Hildebrand Elias C. Ligtas

Built an AI-powered document analyzer SaaS with both end-user and developer-focused workflows, enabling organizations to upload, extract, summarize, and analyze documents through an intelligent full-stack platform. Designed and implemented secure authentication, API key management, and a dedicated developer portal at docology-developers.hildebrandligtas.com for integrating document analysis capabilities into external applications and automation pipelines. Engineered scalable backend APIs, asynchronous document processing workflows, intelligent search, and cloud-ready infrastructure to support AI-driven productivity, automation, and developer platform use cases.

InvoiceData is a modern invoice generation and management platform built for freelancers, small businesses, and growing teams that need a faster, more reliable way to create, send, track, and manage invoices. The system combines a polished Next.js frontend with a structured Spring-based backend, supporting professional invoice creation, secure sharing, payment tracking, reminders, analytics, drafts, and user-specific invoice settings. Engineered with a clean layered backend architecture spanning domain, application, infrastructure, persistence, event, scheduler, and web layers to support SaaS-grade reliability, automation, and extensibility.

Engineered a production-grade real-time messaging platform delivering instant, low-latency conversations between users through a fully bidirectional WebSocket architecture. Architected an end-to-end full-stack solution combining a Next.js 16 / React 19 client, a NestJS backend, Socket.IO for real-time transport, Prisma-backed persistence, and S3-based media handling to support reliable message delivery, presence, and rich media exchange at scale. Implemented enterprise-grade authentication including credential login, OAuth sign-in, account registration, and complete password recovery flows (forgot password and secure reset), alongside AI-assisted conversational features, request rate limiting, and a polished, accessibility-conscious user interface designed for professional, everyday communication.

Delivered a customer-facing beauty and lifestyle storefront designed to move shoppers smoothly from campaign discovery to product selection and account management. Built and customized the WordPress and WooCommerce experience across promotional landing pages, category-led product discovery, cart workflows, secure customer authentication, and responsive layouts, creating a cohesive retail journey that supports both merchandising and day-to-day store operations.

Contributed to an enterprise carbon-neutrality engagement platform that helps employees turn sustainability education into measurable participation. Delivered coordinated mobile and web-admin experiences spanning educational quizzes, events, points and rewards, rankings, announcements, user profiles, and activity tracking, with an operations dashboard that gives administrators the tools and visibility required to manage the program at organizational scale.

Developed a presentation-led website for a creative studio, translating its brand, services, partnerships, and portfolio into a focused digital experience. Structured the site around clear service discovery and consultation conversion, combining custom WordPress implementation, responsive visual composition, portfolio storytelling, and lead-capture workflows in a site that remains straightforward for the business team to maintain.